In the midst of these fears, the emperor, Frederick III., came into Italy to be crowned. On the thirtieth of January, 1451, he entered Florence with fifteen hundred horse, and was most honorably received by the Signory. He remained in the city till the sixth of February, and then proceeded to Rome for his coronation, where, having been solemnly consecrated, and his marriage celebrated with the empress, who had come to Rome by sea, he returned to Germany, and again passed through Florence in May, with the same honors as upon his arrival. On his return, having derived some benefits from the marquis of Mantua, he conceded to him Modena and Reggio. In the meantime, the Florentines did not fail to prepare themselves for immediate war; and to augment their influence, and strike the enemy with terror, they, in conjunction with the duke, entered into alliance with the king of France for the mutual defense of their states. This treaty was published with great pomp throughout all Italy. The month of May, 1452, having arrived, the Venetians thought it not desirable to defer any longer their attack upon the duke, and with sixteen thousand horse and six thousand foot assailed his territories in the direction of Lodi, while the marquis of Montferrat, instigated either by his own ambition or the entreaties of the Venetians, did the same on the side of Alexandria. The duke assembled a force of eighteen thousand cavalry and three thousand infantry, garrisoned Alexandria and Lodi, and all the other places where the enemy might annoy them. He then attacked the Brescian territory, and greatly harassed the Venetians; while both parties alike plundered the country and ravaged the smaller towns. Having defeated the marquis of Montferrat at Alexandria, the duke was able to unite his whole force against the Venetians and invade their territory.